Flue System - Keston Combi C30 Installation And Servicing Instructions

2.3 FLUE SYSTEM

IMPORTANT
When installing a replacement boiler a new flue system is recommended. However re-using the existing
boiler flue installation is acceptable if the installer checks and confirms:
• The flue pipe is the approved Marley/Polypipe/Terrain 50mm muPVC solvent weld flue system
• The flue installation is upgraded to the most recent flue standards taking particular care to comply with
flues in voids
• A risk assessment is conducted to confirm the effectiveness of the flue
• The existing flue will last the lifetime of the new appliance
DESIGN
Individual air supply and flue outlet pipes are used as standard.
The material approved for this application which MUST be used are:
- Marley muPVC Solvent Weld System (50mm)
- Polypipe System 2000 muPVC solvent weld (50mm)
- Polypipe Terrain 200 muPVC Solvent Weld System (50mm)
to BS5255 and/or BSEN1566-11 and BSEN1329, are the only systems approved for this application.
The following pipe and fittings are approved.
Polypipe System 2000 muPVC solvent Weld System (50mm)
Polypipe Code
MU 301 4m length muPVC wastepipe 5/225
MU 313 50mm x 45 deg muPVC obtuse bend
MU 314 50mm x 92.5 deg muPVC swept bend
MU 310 50mm muPVC straight coupling
MU 316 50mm x 92.5 deg muPVC swept tee
Marley muPVC Solvent Weld System (50mm)
Marley Code
KP 304 50mm x 4m double spigot pipe
KP32 50mm x 45 deg bend
KSC3 50mm straight coupling
KB3 50mm x 88.5 deg bend
KT3 50mm swept tee
Polypipe Terraine Solvent Weld System (50mm)
Polypipe Code
200.2.40 4m length muPVC wastepipe
201.2.135 50mm x 135 deg muPVC bend
200.2.91
50mm x 91
210.2 50mm muPVC straight coupling
204.2.135 50mm muPVC swept tee
Consideration MUST be given to expansion and contraction of the flue. Refer to Assembly Practice (Section 2.12) in this
installation and Servicing Instructions for further guidance.
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SECTION 2 - INSTALLATION
1 / deg muPVC swept bend
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Installation and Servicing